Reviewed-by: Michael D Kinney <michael.d.kin...@intel.com>
> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Ard Biesheuvel
> Sent: Thursday, February 2, 2023 10:04 AM
> To: devel@edk2.groups.io
> Cc: Ard Biesheuvel <a...@kernel.org>; Kinney, Michael D
> <michael.d.kin...@intel.com>; Gao, Liming <gaolim...@byosoft.com.cn>; Yao,
> Jiewen <jiewen....@intel.com>; Kubacki, Michael
> <michael.kuba...@microsoft.com>; Sean Brogan <sean.bro...@microsoft.com>;
> Rebecca
> Cran <quic_rc...@quicinc.com>; Leif Lindholm <quic_llind...@quicinc.com>;
> Sami Mujawar <sami.muja...@arm.com>; Taylor Beebe
> <t...@taylorbeebe.com>
> Subject: [edk2-devel] [RFC PATCH 1/3] MdePkg: Update MemoryAttributesTable to
> v2.10
>
> UEFI v2.10 introduces a new flag to the memory attributes table to
> inform the OS whether or not runtime services code regions were emitted
> by the compiler with guard instructions for forward edge control flow
> integrity enforcement.
>
> So update our definition accordingly.
>
> Signed-off-by: Ard Biesheuvel <a...@kernel.org>
> ---
> MdePkg/Include/Guid/MemoryAttributesTable.h | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/MdePkg/Include/Guid/MemoryAttributesTable.h
> b/MdePkg/Include/Guid/MemoryAttributesTable.h
> index 82f83a67b96d..238c14ff92df 100644
> --- a/MdePkg/Include/Guid/MemoryAttributesTable.h
> +++ b/MdePkg/Include/Guid/MemoryAttributesTable.h
> @@ -17,11 +17,15 @@ typedef struct {
> UINT32 Version;
>
> UINT32 NumberOfEntries;
>
> UINT32 DescriptorSize;
>
> - UINT32 Reserved;
>
> + UINT32 Flags;
>
> // EFI_MEMORY_DESCRIPTOR Entry[1];
>
> } EFI_MEMORY_ATTRIBUTES_TABLE;
>
>
>
> -#define EFI_MEMORY_ATTRIBUTES_TABLE_VERSION 0x00000001
>
> +#define EFI_MEMORY_ATTRIBUTES_TABLE_VERSION 0x00000002
>
> +
>
> +#define EFI_MEMORY_ATTRIBUTES_FLAGS_RT_FORWARD_CONTROL_FLOW_GUARD 0x1
>
> +// BIT0 implies that Runtime code includes the forward control flow guard
>
> +// instruction, such as X86 CET-IBT or ARM BTI.
>
>
>
> extern EFI_GUID gEfiMemoryAttributesTableGuid;
>
>
>
> --
> 2.39.1
>
>
>
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